Printing mechanism for type-writers.



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R. w. UHLIG. PRINTING MEGHANISM FOR TYPE WRITERS.

APPLICATION FILED DEU. 18, 1908.

936,833, Patented oct. i2, 1909.

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R. W. UHLIG/ 4 PRINTING M EGHANISM FOR TYPE WRITERS. APPLICATION FILEDDBO. 18, 1908.

936,833. Patented oct. 12, 1909.

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R.' W. UHLIG.. n PRINTING MEGHANISM FOR'TYPE WRITERS.

APPLIOATION mman DEo.1a','19oa. 936,833.

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PRINTING MECEANISM FOR TYPE WRITERS.

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, I R. W; UHLIG. PRINTING MEGHANISM FOR TYPE WRITFRS. v

l APPLICATION FILED 135:0. V18, 1908, 936,833.

Patented oct. 12,1909.

UNITED sTAr/ns PATENT orion.

RICHARD W. UHLIG, OF U-THERFORD, NEW JERSEY, ASSIGNOR TO EMERSON TYPE-WRITER COMPANY, F CHICAGO, ILLINOIS, A CORPORATION 0F MAINE.

PRINTING MECHNISM FOR TYPE-WRITRS.

p specification of Letters Patent.

Application filed December 18, 190B. Serial No. 468,135.

To all whom i may concern.: l' Be it known that I, RICHARD W. UHLIG, acitizen of 'the-United States. residing at Rutherford, in the county ofBergen and State of New Jersey, have invented certain new and usefulImprovements inPrinting MechanislnforType-Wvriters, of which the lfollowing is a specification. The principal object of the presentinvention is to so. construct and combine the various devices comprisingthe printing mechanism of a` visiblewriting typewriter that the keyaction of the individual keys will be g equ'alized from end to end ofthe several banks of keys, and so that the key action of all of thebanks will likewise be equalized. In this manner each of the keys willrequire l the same stroke or blow to produce an equal impression on thepaper, whereby the resultf ing action of the type will be uniform, andthe impressions registered on the paper will be even throughout. This,of course, results in a much clearer and neater copy than i would resultfrom a machine in which some' of the type strike the paper withA moreforce il than others. Every essential portion of the printing mechanismis devised with respect to this principle of operation, and the keylevers, key lever springs, key lever stops, cranked type bars, universalbar-tand other portions of the mechanism, are all proportioned andcombined together in such mani ner as to equalize the resulting actionof the n Fig. 6 a face view of the universal bar; ld

machine as a whole.

The invention relates to the construction E of the individual elementsabove named, as well as others to be hereinafter referred to, and totheir1 combination and oordination'- in the manner to be hereinafterdescribed.

The invention .further relates to the construction of the type barsthemselves and to the method of nesting them together in order tosecureequalization of the stroke; as well as lightness of construction,perfection of action, and rigidity in mounting; `and also f to theguideways provided for centering each of the type heads so as toregister its stroke in the exact spot-intended on the printing line. The.object of the guideways is to prevent any imperfection .in the strokeWlnch '2 might result from distortion of -the type bar clue to lack(insufficient rigidity, or to vibral tion or originator acquiredimperfections in t the mountlngfor-the type bar, all of which variationsfrom the normal are prevented by i the action of the guideways whichhold the type head rigidly at the moment it strikes the 'paper on theplaten, whereby a firm even blow is registered and all vibratorymovement avoided.

The invention further relates to the means provided for verticallyshifting' the type bar frame to bring any one of three styles oftypeinto register with the printing line; and to the machine as a whole andthe individual arts thereof.

Furt er objects will appear from a detailed description of theinvention, which 4consists in the features of construction and andshowing in dotted lines the journala sockets on the right hand side;Fig. 4 a longitudinal/sectional view through the frame,

showing on one side the variations in the' position of the cranks of thetype bars; Fig. 5 a sectional elevation, taken on line of l4`ig.2,looking in the direction of the arrow;

1 7 a face view of the key lever stop bar; Fig. 8 a sectional View,takenthrough the machine from front to rear near the left edge thereof,and showing the vertical shifting f mechanism for the type bar frame;and Fig.

9 a set of three keys, showing the relation of the keys to one another.

The machine as a whole is built into a. framework which comprises a flattop wall 10 of rectangular` shape, which is cut away in front to providespace for three banks of keys. The framework further comprises a pair ofside *Walls 11, which are earned for- Ward in front .of the top wall inthe form 'of extensions l2, whichare connected by means of a front rail13 forming an inclosure, of the' usual character, for the keys and keylevers. The side walls arevconnected by means of front and rear crosswalls 14 and 15, respectively, and the framework' as a whole is mountedupon cushion feet 1 6 suit- Iatented Oct. i2, 1909.

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'ably positioned to provide a firm support for the machine'.

The keys are arranged in .three banks, an upper bank, 'an intermediatebank, and a lower bank; although the invention is not limited to theemployment of three banks, since four banks or any other number mightvInS-view of the fact that three banks of keys are-employed, it isnecessary to` employ key. levers of. three diiferent lengths,- a seriesof short key levers 17, intermediate key levers 18, and long key levers19, bestshwn in Fig. 9. All of the keyl levens are pivoted, at theirinner 'ends,vto a transversely extending key lever rod` 20, whichextends from side to side of the machine and has its Iends rigidlyentered and held within the side walls of the framework. Each of the keyleversis .provided with an upturned forward end 21, which receives albutton 22 of thef usual character; and the upturned ends ofthe keylevers com osing vthe three `banks are of a length to a ord a ment withthe `rod upon which they are mounted and prevents any .interferenceone`upwardly projecting arms 25, 2 6, and 27,v

with the other. The long, intermediate, and short key lever`s are ofbell crank formation and are provided, at their inner ends, withrespectively, which are of varying length, as best indicated in Fig. 9,the long, intermediate, and short arms being formed on the long,intermediate, and short levers, rcspectively. y

The inner angle of each of the key levers is extended to form a prong28, and the prongs of the short, intermediate, and long leversareprovided with lower, intermediate, and upper bosses 29, 30, and 31,rcspee'. tively, as best shown in F ig. 9. The prongs of the key leversoperate within slots.32 in a. cross guide flange 33 which depends fromthe top wall of the framework and extends in parallel relation with andslightly to the rear of the front cross wall 14, as best shown in Fig.2. ,Immediately in front of the guide liange 33 is located a universalbar 34, the peculiar shape of which is shown in'l` Fig. 6. The universalbar 34 is provided, on its'upper edge, with. three eyes 35 embracing arod 36 which serves to hinge the universalv bar at its upper edge andpermit the bar to be swung back under the pressure imparted ,by the keylevers. The .lower edgey of the universal bar is cut away to providelong, intermediate, and short prongs 37, 38,

and 39, respectively; andthe key levers are' mounted on their rod insuitable position to bring the lower bosses 29 onthe short levers intoengagement with the long prongs 37;

the intermediate bosses 30 on the intermediate levers into engagementwith the-intermediate prongs 38 ;V and the upper prongs 31 on the longlevers into engagement with the short prongs 39 of the universal bar.The arrangement is such that by depressing one of the upper keys withits short lever a given distance, as, for instance, half an inch, a

-greater angular' degree of movement will be imparted tothe lower boss29 than will be imparted to'the upper boss 31 by an equal depression. ofone` of the .longkey levers.

'Inequality ofmovement, however, is compensated for partly by the factthat the lower bosses 29on the short levers are closer tov the pivotal,point than the upper bosses 31 on the long levers; and the resultingaction is further equalized in viewof the fact that the lower bossescontact the long prongs 37 which are farthest from the axis of movementof the .universal bar, while the upper bosses 31 contact the shortprongs which are closest to the axis of movement. By the arrangement"above described, inequalities of movement'in the universal bar, whichotherwise would f result freni differences in the lengthsl of the keylevers, are equalized, and likewise the stroke or blow required toactuate the individual keys of different banks g `The type bar frame isformed in two sections on halves, each of which' comprises a lowerHorizontal rail 40 and an upper diag onally extending rail 41 having inits upper edge steps 42. The upper and lower rails are connected bymeans of 'vertical inneran'd outer rails 43 and 44, respectively; and,in order to provide for ease in assembling, the upperA and lower'rails'are provided with journal recesses 45 and .46, respectively, whichrecesses, when the parts arel assembled, are covered and inclosed bymeans of a frame plate or housing 47, of the same shape as the framesection, which is` screwed or otherwise secured to the face thereof. Theinner rails of the two frame sections are connected by means of a crosshead 48 which has secured vthereto an upwardly extending yoke 49 whichcarries on its cross head a .type bar guide 50 which is of forwardlyopening Vformation comprising rearwardly .converging side arms 51 whichconverge tomounting for two groups or sets of type bars which areadapted to nest together; f

. is type blocks Will lswing in a horizontal plane; fand ,in view of thefact tliatthe ty 'e carry- Eachof the type bars comprises a verticalrock shaft portion 53, the upper and lower nal sockets 45 and 46,respectively, 'and the intermediate portions of Which are provided' withcranks 54.- The rock shaft portions ofthe ty-pe bars will decreaseuniformly from the center toward the end of each group of type hars, asshown in Fig.y 3. Each-of the type bars further comprises a flattenedinteri mediate portion` 55, which intermediate por-l tions earry, attheireouter ends, vertical type carrier heads 56 very nearly equal inlength from end to end of the group, which type carrier heads serve as amounting for type blocks 57 which carry the usual large and smallletters and figures, 4punctuating marks and other characters required intypewrith ino. gradually increasing length from the inner to the outerend ofthe group and extend at differing angles with respectlto theseveral pivotall points-asbest shown in Fig; l. In

that figure it will benoted'that the innertype bars have theirintermediate sections extended back and away' from the printing point,and thatthe outer intermediate type bar sections 'extend forwardlytoward'theprinting point,v as-compared' With the axes of movement in thetwocases, and that the remaining intermediate type bar sections ex-Utend at uniformlyvarying angles between the extremes presented by theinnerfaniilv lso far as possible, the distance traveled byeachof'the'type carrying heads in its swing .from normal positiontoprinting position; 'With the parts in the-position shown, the 1n.

:1 ner headswill -swing through an .are having a 'shorter --radius butmuch greater angle than the outer heads, although the distance traveledwill, of necessity, be somewhat less. All ofjth'e type bars are arrangedso that the f ii'ig"xheads are all of' substantial y equalI'engtlLQand,` in vievv of the fact that the i upper ends of the rockshaft portions are of varyi lengths and are arranfed in steppedformanon, it follows that tha intermediate l portions of the type barsmust extend diagonally upward from the type bar frame to the pointlo'fconnection Aof the ty e carrying =heads.A Furthermorathe fact tat thesec-v :tions of the type bars are flat enablesthem 60, 'opfjjtheintermediate sections brings their @greatest dimension4 in transverserelation with-respect to the plane ,of their type surfaces, .so thatjthebars are heavily reinforcedl against bending, twisting or vibration whenThe intermediate Vsections are of` prior construction, type bars wereemployed, ends of which are journaled Within the your jf theintermediate sections of which extended horizontally, and the typecarrying heads of which Were-of varying length andarranged insteppedyformation, but the present arrangement is much superior, in-that itl reisultsin af much stiii'er and lighter bar, and

at the same time tends to more nearly equal ize the Weight between theinner andouter bars-than was previously possible.

The type barframe is slidably mounted Within vert-icallguideways 58 onthe inner faces-of theside Walls of the framework, which permitsvertical adjustment of the 'frame,'carrying the entire number of typebars by means of shifting-levers to be hereinafter described. f

The inner arms ofthe key levers are connected vwith respectivetype barsby means of links 59, which links consistI ot'hooked inner and outersections GOand (il, respectively, connected by means ofright-anddeft-thread ed tulnbuckles 62, Wherebyrthe tension of vthe barscan be regulated.' Thel inner sections of the lin-ks' are looselyhookedaronnd'the respectivef cranks, and the outer sections are hookedthrough holes in the ends of the type lever arms. The links are arrangedto pro gressively and forwardly converge toward v'the center of themachine and are arranged in groups of three 1n accordance with thearrangement ofthe keys in three banks. Furthermore, the inner arms Iofthe key levers, although arranged'in groups of three, of va.-ryinglengths, gradually increase in length from the sides of theimaehinetoward the center, soy that'the inner arm ofthe long center key leverWill be longer than any of the others, aindfwill'engage its link-at thegreatest distanceA from the pivotal point ofthe lever. The cranks,instead of lying ^in the same plane, When in norma-l position flie' inuniformly varying planes, asbest shown in' Fig. 4. The outermost crankof eaciigroupfof type bars lies in parallelism with the transverse planeof the machine, While the centermostl crank, when in norm-al position,lies at. an angleabout 515 behindsuch plane, the intermediate cranksbeing'arranged at varying angles between these two extremes. The resultof this arrangement is that, when one of the outermost ke'ys isdepressed and its link drawnforward, the initial pull of the4 linkWill'be at substantially rightangles to the iee- .iii-

cra-nk; and the outer and heavier type bar.'

which has the greatest length of tratel, will receive an initial pull4or impulse with the crank. at right angles to the pull andl ifi-thebest position to overcome the initial inertia ofthe heavier type bar,l.Toward the end of the s'troke, after the bar has acquired its initialmomentum, it is desirable 'to relieve the pull ori-the crankl andtherebydiminish the acqi'iiredv momentum of the type bar when the impression isstruck. The arrangementl is one which accomplishes this result in viewof the fact that toward the end of the stroke the crank will be swungalmost to its dead center position, so thwtoward the end of the strokethe pull of the link will be practically eliminated. In thel case of`the innermostJ type bars, which are the lightest and .which have theleast movement, itis desirable to startmoregradually and end up with themomentum acquired in order to compensate for the diii'erence in weightin the bars ,and the arrangement is one. which accomplishes theseresults, in view of the fact that, at the beginning of the stroke, thecrankwill lie behind its position of greatest etliciency, which will bereached when the crank is drawn to right angle relation with the link,and the stroke will-end with the crank in a position at a substantialangle tothe link, so that none of the momentum acquired in the earlieststages of the stroke will be lost at the time the blow is struck.

The crank arrangement, together with the variable anOles at which theintermediatesections of the type bars are set, serveinpart to equalizethe action of the key mechanism.

Further equalization is secured by the'arrangement of the key leverspring plate 63, which is in the form of a flat plate, screwed orotherwise secured tothe top wall of the framework at a 'point where thelat,- ter is cut away to expose the material mechanism of the machine.The spring plate is provided with a plurality of depending springs 64,which are arranged in groups of three of varying lengths, as best shownin Fig. 5. The'prongs 'of these groups increase in length from thecenter toward the ends vwhile retaining their group arrangement asregards the length ofthe prongs/composing each individiial group. Theprongs are struck down at an angle with respect to the body of theplate, which is held in position by means of a clamping bar 65, andVeach of the prongs engages the front edgeof the inner arm of theadjacent k`ey lever. The arrangement is one which brings the I longestinner arm of each group of three levers into engagement with theshortest prong of a group of three prongs on. the spring plate. Thisyarrangement is maintained from side to side,'the lengths of theindividual prongs vcomposing each `group being increased from the centerto the sides co-incident with the decrease inthe lengths of the typelever arms from the center toward the sides of thev machine. This springari rangement further serves to aid in equalizing the action'of the keysin that the longest arms, which control the movements of the inner,"lighter type bars, will engage the shortest and most rigid springprongs, and

`the shortest arms, which control the movements of the outer, heaviertype bars,t will engage the longest and most resilient spring prongs.This puts a greater spring resistance on the inner type bars, therebyretarding their swing to compensate for their lesser weight anddistanceof travel. By arranging the prongs in sets of three, the variantaction which, unless otherwise counteracted, would result from thediercnce in length of the three key levers composing a group, is in ameasure counteracted, and likewise a heavier spring tension ismaintained against the center groups of key levers than against theouter groups of key levers, so that the variation from side to side ofthe machine will be equalized. As a further means of equalizing theaction of all the keys, a stop bar 66 is provided, the for- Vmationof'which is shown in Fig. 7, which raises the stop surfaces of the stopscomposing the center groups to a higher level than the surfaces of thestops composing the outer groups, whereby the throw of the center keyswill be shorter than the throw of the outer keys.' Furthermorefthe grouparrangement is desirable in order to per.- mit the vshort key levers,which are struck from a point relatively close to their axes, to have amovement through a greater angle `than the long or lower key leverswhich are struck from a position at a greater distance from the pivotalpoint. This arrangement equalizes the length of stroke required todepress any one of a group of three levers'.

` The return movement of the key levers is regulated by means of arubber covered stop bar (hl-which extends across the machine immediatelyabove the entire set of key bars and holds them iii normal position.

The inner ends of the link sections 60, immediately in front of theirpoint of connection with the cranks', are entered between steadying rods70, which extend from side to side of the machine and serve to preventvertical displacement and consequent interference ofthe bars whileallowing free longitudinal ,movement In addition to the key leversprings which have been previously described, each of the rock shaftsections of the type bars is provided, at Vits upper end, with a smallcoil spring'l, as shown in Fig. 3. The function of these springs is tohold the type bars in normal position. If desired, the tension of thesesprings could be graduated, although such graduationis not necessarywhere the other means herein described for equalizing the action havebeen provided.`

Each of the vertiealtype bar heads isprovided l'with an vinwardlproj-ectin pointed printing position, is adapted to*enter the :hole 52between the arms of the-Vl shaped guidefO, so thatzthe moment theimpression .,s --struck the type 'bar head vwill be held rigidly againstvibration or sideu play,l being guided to position between the side armsand lheld in position bythe register oi the pin with the guide hole.

The type bar "heads Vare :maintained Iin their normal-or retractedposition by means oftype head rests '73 lprovided'with leatherbuiifersvT/l; which cushionthev type bar'heads as they arethrown backtonormal4 position. The type head rests are held Velevated and 5 rigidlysupported byv 4outwardly converging bracesl75,and 7 6, which terminatein a' head 7 7 connected with the-upper lsteppedrail of' thetypebarframe near its outer end, the

innerentlFS-o'f the typel head rest being directly connected 1to theupperend 'of 'the -inner vertical frail'of the type barframe.

'The type bars are-screened and' protected by means of shielils`79--ofsuitable conguration to overlie the entire group oi-type-'barsl when i-ntheir retractedl position.

The ltype 'bar 'frame `is adapted 'to be thrown either above or belowitsnormalcenj ter position, in orderto' bringeither.capitalsv orpunctuation marks intogregister with the printing line, by means of--suitable lever mechanism ofthe following character. -In' vieiv of thegenerally increased printingsurface of capital type, as comparedwith'ftype `formed to imprint punctuation lmarks or -similarcharacters,it is desirable tohave the capitals formed on the-type bloc-ks in'thelowermo'st position witlr'the small lettersoc-l cupying the centerynormal position and the punctuation marks occupying the u lper'position. This brings lthe capitals c osest-toithe angle at the lowerend o'f the typ? barl lhead .and Iclosest to the iguide-pin. This is Vthe-point yof greatestl rigidity, sot-hat the hardest stroke *will* beregistered at this,V

point, whichis desirablein view of the incr ased surface'varea ofthecapitalsas -com pared with the' small letters orfpnnctuation marks.The machine is, therefore, arranged to elevate the type barframewhen'itis desired to make a shift for-capitals, :and-this `elevation isaccomplished by vmeans of an, elevating shift lever -80 which is`pivotedto the'key bar rod 20,-and terminates, at its .forward enda inan upturned button key 8l limrardly projects"from-the side rail 44 ofthe vertical `movable ytype bar frame, as shown. in `Fig. '3. Whenthekey-81 is de- 4pressedthe'hooked end'82 4of the lever will be-elevated,thereby `causingthe hooked endt-ofride over the pinf83a1id causing thelat-- ter to-swingtward the rear. "This movexi-nentelevates the slottedupper arm 8G of "-tlielever and; liftstlie type bar frame, Awhichlifting-movement is assisted by the action of-'a'pair of coil springs88, the'lower ends "-ofwhich are securedy to the sides of the typelbarframe,and the upper ends of which are `hooked around the lowermostbar 70. In

order to equalize the movement on oppositev f'pressed,-the inner'end ofthe lever 89 will e"beeleva-ted away -froni zthe `pin '83, which'fivilld-allowgraVity to-actland permit the type'Ibarffrasme=todescend-against the tension of {thelspringsSiS andwill-permit the pin 83 ontfheiend 'of 'the Vlowerarm of the bell cranklever 84 to swing outwardly andup- 'Wardly runder the vlever 89. CEachoffthe -shiftifng levers is provided with an upwardly extending finger91,-"a'nd each ofthe fingers lis engagedfby .a forwardly extending coil-sprin-g`92avhioh issecured to a-suitable por- --tionoffthe framework.`"When the depress ing lever is released,fthe spring 92,- acti-ngAon'ftvh ".tingerill of the lever, will-throw -'dowi1the inner end ofthelever 89 against theiunderlying pin 83, whichwill be moved 'back tovthe-'normal position shown in Fig. 2, which `movement will -raise thetype bar '5frame,assistet by the springs-88,' until it 'has assumed itsnormal or intermediate position. -FigpjS diagrammatically Vshows the'elevating-shifty leverin A:full lines, land the depressing 'shiftIlever in dotted lines, the key on each `of the 1 levers being depressed`to*V its )lowermost position;

Inuse,=when any on'eof the keys is depressed,` the linkarinon the keylever will be drawn forward, which'moves the link and exerts a pull onlthe crankedportion of the intended! type bar; The nature and extent ofllO the pull will be determined'iireach case by the position of 1thegtype bar itself. \Each ot these factors is to be determined withspecial nearly equal weight, although it is desirable,

forv obvious reasons, to keep the weight of all the bars at a mmunum andsecure the l equalization by the regulation of other factors whichdetermine the character of the stroke. y circle each of the rock shaftsections of the type bars areA intended /to hold the bars -inV normal orretracted position regardless of the action of the spring prongs.

` ln order to shift thetype bar frame vertically, it is desirable thatthe hooked inner ends of the links encircle the cranks of the type bars,when in normal position, without actually pressing against them in amanner which would impede' the shifting movement of the crank sectionsup and down through the hooked link ends as'theframe is raised andlowered. If the spring prongs were relied on entirely to hold the barsin position to permit shifting, it -would be necessary4 to adjust thetension of each spring prong with such 'eXtreme ni'cetyIas tobeimpracticable in the assembling of themachine. -It is desirable,therefore, that the `return e movement ofthe key levers be limited atsuch point as to hold the links out ofactual contact with the cranks andrely upon the coil `springs for imparting th slight additional tensionvnecessary to ally return 4 the bars to normal vposition. after thecranks have been relieved from engagement with the link hooks. It is notthe intention, however,`to limit the invention to the`employnient ofcoil springs, since the adjustment of the spring prongs might beregulated with sufficient nicety to effect the complete returnthereafter. The sprinof y6o feel a light tension, and one which requiresmovement without the provision of additional springs. The provision ofturnbuckles enables the length of each of the links to be perfectlyadjusted to act in the manner specified, and after theinitial'adjustment of the links at the factory the turnbuckles can v besoldered or'otherwise rigidly secured to the link sections toprevent.,mal-adjustment tension of all of the key levers is regulatedbar contro led,'so thatvthe type' bar which requires the most power toactuate it will less 4power will lfeel 'a correspondingly heaviertension. The springs which are secured to the typebar frame counteractin part the action of gravity and assist in rais- The small coil springswhich en-v withregard to the amount of owe'r required to throw the typeing the frame, although the weight of thelatter,`c`arrying with it thetype bars, will always besufficient to over-balance the tension of thesprings, allowing gravity to act when it is desired to lower the frame.If the springs were removed, however, the weight of tlus mechanism wouldbe so reat as to render the shifting movements diflicult andunsatisfactory. A

ln a certain prior construction, the cranked sections of the type barswere located entirely below their journal mountings, but the'presentarrangement is much superior, in that the rock shaft sections of thetype bars will be journaled and supported on each side of the crank, sothat the action of the latter will be more certain, by reasonof therfactthat the rock shaft section on the bar will not be subjected to anymovement hich, in the older construction, tended to cramp the bar andinterfere with its freedom of action. The method of shift ing the typebar frame in either direction is one which causes the frame to movesteadily and easily to the desired position; and the arrangement of thetype block is one which results in the striking of each set ofcharacters with just -suliicient force to equalize the impressionsregistered by type of any selected character.

The printing mechanism, as a whole is .extremely compact in character,and the horizontal movement'of the type bars not only eliminates theaction of gravity in the forward and return movements, but also reducesthe vertical height of the machine, with the result that the completemachine is firm and strong and very ypleasing in appearance.

What I regard asV new and desire to secure by Letters Patent is:

1. ln typewriterA printing mechanism, the

Acor'nbination of a plurality ofV nested type bars, each of thel typebars comprising a type carrying section, a rock shaft section, and anintermediate connecting section, journal mountings for the rock sha ftsections, cranks formed intermediate said journal mountings, the cranksnormally lying in variant angular positions with respect to a transYverse vertical plane, and key levers and connections for actuating saidcranks, substan- 1tially as described.:

25111 typewriter printingmechanism, the v combina-tion of a plurality ofnested type bars, each of the type bars comprising a type carryingsection, a rock shaft section, and an intermediate connectingsectiomjournal mountings for the rock shaft sections,

cranks formed `intermediatel said journal mountings, the cranks normallylying in variant angular positions with. respect to a transversevertical plane, the inner cranks being normally turned more to the rearofl such plane. than the outer cranks, and key assess '7 form to. impartactuating movements'to the type bars, and connections between thetypebars. and the rear ends of the respective key levers,` engaging thelatter at' dierent ver tical distances `from the pivotal centers ofthekey levers for equalizing theactionV of 'the keys, substantially'asdescribed.-

4. lin. typewriter printing mechanism, a'

plurality of pivotedl key levers of di'erent lengths, having their 'endsin theiorm of keys arranged in banks, andfhaving at their inner-endsupwardlyextending arms, type bars,and links actuating said. typebars, the links envagingthe' long lever arms being connecte therewith atthe greater distances.

from. the pivotal centers, the link connectionsat the center of. themachine tor each bank. of key levers being connected; at greaterdistances# from the pivotal: centers than the links toward the sides. ofthe machine-, for

- equalizing the action ot the keys, substantially as described.

5. Intypewriter printing mechanism, a

'plurality of pivotedrkey levers of dierent lengths, having their endslinthe formv of keys arranged in banks, and. having at their v inner endsupwardly extending arms, type bars,.ad links actuatingsaid@ type bars,the links engaging the long lever arms being connected therewith at thegreater distances from the pivotal centers, the link connec tions at thecenterof the mach-ine for each bank of key leversv being connected atgreater distances from the pivotal centers thanu the links towardthesides of the machine, for equalizing the action-of the keys, and:springs engaging the arms on said levers, the tene sion of the springsacting uponl the key lei .vers of each bank being Agraduated from thecenter toward the sides of the machine, for aiding in equalizing theaction, substantiallyas described. l

6. In typewriter printing mechanism, a luralitj,T of pivoted lkey leversof different engths, having their ends in the form of keys arranged 1nbanks, and having at their inn-er ends upwardly 'extending arms, typebars2 and links actuating said type bars, the

links engaging the long lever arms being connected therewith at thegreater distances from the pivotal centers, the link connections at thecenter ofthe machine for each bank of key levers being connected atgreater distances from the pivotal centers than the links toward thesides of the machine, for equalizing the action of the keys, and flatsprings engaging the arms of the key levers,

the springs engaging the-center arms of each bank: o''key. levers'being;of less length and greater tension-,than the flat. springs engag-ling-the of the outer key levers, for aiding in equalizingthe action,.substantially as described.

T. In typewriter printing mechanism, a; plurality of pivoted key leversof different lengths, having their ends in the form of keys arrangedin.v banks, and having4 at their inner ends upwardly extending arms,type bars, andl links actuating said type bars, the links engaging thelong lever arms being' connected'therewith at the greater distances fromthe pivotal centers,VV the link connections at the center; of' the`machine for each bank otvkey` leversbeingxconnected at greater distancesfrom the pivotal centers than the links toward the sides of thevmachine, for equalizing the actionpol the keys, and a spring, plateprovided. with springprongs 'o varying lengths, the' prongs engaging:the

armsV of the center key levers of each ban-k of'keys beingot less lengthand greater tension= than the prongs engaging the arms of the side keylevers of each bank of keys, for aiding; in eq'nalizing the action, isubstantially as described. c l Y 8. I-n-'typewriter printing;mechanism, a plurality of type bars pivoted toswing' on vertical axes, aplurality of key levers all pivoted in the same straaght horizontal lineand having their forward ends in the form of keys and havingtheir rearinner ends in form to impart actuating movements to-the type bars, andconnections between the type bars and therear ends ofv the respectivekeylevers, engaging the latter at ldifferent distances'- from the: pivotalcenters of the key levers for equalizing the' action: of thekeycs,` theconnections for the centenkey leversl engaging the rear ends thereoateat-er distances fromV the pivotal.- centers or the levers than theconnections for the key levers toward the sides oli the machine,.substantially as described'. I

9: In typewriter printingmechanism, the combination of a plurality ofkey levens, a typeban for each: key lever, connections between each-ofthe key levers-.and itsttype bar,

the connections engaging thekey levers at suitable points to equalizethe action oli the key levers and the throw ofthe type bars, and springsacting upon the key levers and having variant tension for equalizing theaction, substantially as described.

10. In typewriter printing mechanism, the combination of a plurality ofkey levers of different lengths arranged in banks, and a universal barhung adjacent to the key levers and adapted to be engaved by the keylevers of diii'erent banks at dii'ierent distances from the axis ofmovement of the universal bar. for aiding in equalizing the vmovementsof `the universal bar, substantially as described.V

l1. In typewriter printing mechanism, the

combination of a plurality of key levers all pivoted in alinement withone another, the l levers having different degrees of angular imovement, a universalbar hinged adjacent the levers having the greatestdegree of levers ha ving lesser degrees of angular movement at pointscloser to its axis of movement for tending to equalize the movements ofthe. universal bar, substantially as described.

l2. In typewriter printing mechanism, the combination of a plurality ofkey levers all pivoted in alinement with one another, the .levers beingof different lengths to forni banks'of keys, a universal bar hingedadjacent to the levers and adapted to be engaged by the short levers atpoints near its free edge, and adaptedto be engaged by the long leversat oints. closer to its axis of movement., the eversbeing provided withupwardly extending arms.,A links engaging the lever arms, the links forthe long lever arms being conneetedat greater distances from lthe leverpivotal point than the links engaging the short lever arms,substantially as described. 'I

13. In typewriter-printing mechanism, the combinationof a plurality ofkey levers of three ditferent lengths and having their forwardendsupturned to" provide three banks of keys, means forpivoting all ofthe key levers in alinement with one another, two groups of type bars, aconnection between each key lever and its corresponding type bar, thekey levers being formed and the connections being made in a. manner toequalize the key action to compensate for the differences in the weightand swing of the type bars, substantially as described.

14C. In typewriter printing mechanism, the combination of a plurality ofkey levers of three different lengths and having their for ward endsupturned to provide three banks of keys, means for pivoting all of thekey le- A.vers in alinement with one another, two

groups of type bars, a connection between each key lever and its4corresponding type bar, the key levers being formed and the con bars,Aand variant spring mechanism acting tothe levers and adapted to beengaged by L on the key levers for further equalizing the key action,substantially as described. angular movement at points near its free iedge, and adapted to be engaged by the l5. In typewriter printingmechanism, a plurality of type bars pivoted to swing on verticalaxes, aplurality of key levers all pivoted in the same straight horizontal lineand having their forward ends of diterent lengths and upturned tofurnish front and rear banks of keys, the rear inner ends of the keylevers being in forni to impart actuating movements tol the type bars,and connections between the type bars and the rear j endsof therespective key levers, the connections for the long levers of the frontbank of keys engaging the rear inner ends of such levers at greaterdistances from the pivotal points for the key levers than theconnections for the shorter levers furnishing the rear bank of keys,substantially as'doscribed.

16. In typewriter printing mechanism, a plurality of type bars pivotedto swing on vertical axes, a plurality of key levers all pivoted in thesaine straight horizontal line and having their forward ends ofdifferent lengths and npturned to furnish 'front and rear banks of keys,the rear inner ends of the key levers being in -form to impart actuatingmovements to the type bars, and connections between the type bars andthe rear ends of the respective key levers, the connections for the longlevers of the front bank of keys engaging the rear inner ends of suchlevers at greater distances from the pivotal points for the key leversthan the connectionsfor the shorter levers furnishing the rear bank ofkeys, the connections for the center key levers engaging the rear endslthereof at greater distances from the pivotal centers than theconnections for the kev levers toward the sides of the machine,substantially as described.

RICHARD lV. UHLIG.

Witnesses:

li'lanriiv In'risnsi-iiv, JOHN Davis.

